Auto wheel attachment.



P. H. BABUOCK.

AUTO WHEEL ATTACHMENT.

A'PPLIOATION FILED APR. 7, 1913.

1,130,366, Patented Mar.2, 1915.

OFFICE.

' FRANK i1. BABcocK, 0F Pmxsetawaaa raaasasvanm.

A'ri'r'o wianEL Armament Specification of Letters ratii't.

mama 2, 1 9151.

Application filed April 7, 1913. Serial in). 759,516.

applied to the wheel of a vehicle for the purpose of preventing skidding and for the purpose of enhancing the grip of the vehicle wheel upon the ground.

The invention: aims to provide novel means for advancing and retracting the gripping or anti-skidding element.

It is within the scope of the invention to improve generally and to enhance the util-' ity of, devices of thattypeto which the present invention appertainsz' lVith the above and other objects in v1ew which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of in vention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

In the drawings: Figure 1 shows in side elevation, a vehicle to which the present invention has been applied; Fig. is a rear elevation,parts appearing in section; Flg. 3 is a transverse section through the rear axle of the vehiclefthe inner face of one rear wheel appearing in elevation Fig. 4 is a plan showing a pair of links whereby the gripping element is immediately actuated; and Fig. 5 is a plan showing a portion of the operative connection between the actuating pedal and the means whereby the grips are controlled.

In the drawings, the numeral 1 indicates thebody of a vehicle,'the numeral 2 indlcating the rear axle, the differential casing being shown at 3, the hub of the rear wheel being indicated at 1 and the numeral 5 indicating the rim of the rear wheel. The Tim 5 may support a tire 6 of afiy deslred construction.

Movably mounted upon the body 1 within easy reach of the operator is an actuating member which may be a pedal 7. Pivotally connected with the pedal 7 is a rearwardly extended connecting rod 8, pivotally united with a crank arm 9, secured to an upright shaft 10, journaled in a bearing 11 which may be mounted upon the differential casing 3, or may be supported in any other deslred manner.

There is an abutment 12.

upon the shaft 10 which prevents a vertical movement of the shaft without interfering with the rotation of the shaft.- Secured to the shaft 10 is an arm 14, spaced-from the lower end of the shaft 10, and secured to the shaft 10 adjacent its lower end is an arm 15. A link 16 is pivotally connected with the arm. 14, the outer end of the .link 16 being pivotally connected with a rod 17, mounted to slide in a bearing 18, the bearing 18 constituting, preferably, a portionof the rear axle2. The rod 17 is provided with a de-,

pending arm 19. A link 20 is pivotally conrie'ctedwith the arm 15, the link 20 being pivotally connected with a rod 21 mounted to slide in a bearing 22 upheld by the differential casing 3 or in anyother manner. The outer end of the rod 21 is mounted to slide in a bearing 23 which may constitute a portion of the rear axle 2. The rod 21 terminates in a depending arm 24. The arms 19 and24 support shoes 25, and since the shoes 25 are of identical construction, but one shoe will be described.

Referring specifically to Fig. 3, it will be observed that each shoe 25 comprises an arcuate segment 26, the center of curvature of which, preferably, is co-incident with the center of the axle 2. The other, segment 27 of the shoe 25 is arcuate and its center of curvature. is located eccentrically with respect with the center of the rear axle 2'. The segment 27 of the shoe 25 is equipped at its end with an outwardly projecting lip28.

The shoe 25 is ada ted to co-act with rollers 29 carried by sha ts 30, the shafts 30'constituting the pivotal connection between links 31 and 32, the adjacent ends of which are shouldered to form a rule joint 33, Springs 34 connect the links 31 and 32 and serve to maintainthe same at an angle to each other. The links 32 are pivotally connected with the hub 4: as indicated at 35, and the links 31 are pivotally connected as indicated at 36 with grips 37 which may comprise a plurality of tines 38, the tines of the grips being slidably mounted in an annular extension 39 of the rim 5 of the wheel.

In ractical operation, by actuating the pedal 7, the connectin rod 8 will be moved, the connecting rod 8 t rough the medium of the arm 9 rotating the shaft 10. The shaft 10 will actuate the arms 14 and 15, the arm 15 actuating the link and sliding the rod 21 longitudinally, whereupon the arm 24: of the rod'21 will advance one shoe 25 within the circumference defined by the rollers ject ed position, until the rollers, respectively, have ridden off the free end of the segment 26. The lip 28 serves to engage the rollers 29 in the first instance, and to move the rollers outwardly so as to permit the rollers to come into engagement with the segment 26, it being obvious that in the absence of the lip 28 or its equivalent, the shoe 25, when thrust outwardly, would merely bear against the end faces of the rollers 29 and would not enter within the circumferences described by the rollers. rEach roller 29 constitutes a projection which is mounted to move in an orbit.- When the shoe 25* is moved horizontally, the shoe moves into intersecting relation to the orbit described by the projection or roller 29. The lip 28, as will be understood readily is adapted to receive the projection or roller 29 initially. So soon as any one roller 29 has ridden ofi' the free end of the segment 26 the spring 34 will move the links 31 and 32 into angular relation with respect to each other, and thus retract the corresponding grip 37.

Having thus described the invention, what is claimed is 1. In a device of the class described, a

2 wheel comprising a rim and a hub; a grip means for moving the shoe into and out of a the orbit described by the shoe engaging means on the pivot element as the wheel rotates, thereby to actuate the links and to advance the grip with respect to the rim. 5 2. In a device of the class described, a wheel including a rim and a hub; a grip slidable in the rim; a link pivoted to said 'grip; a link pivoted to the hub; a pivot element uniting the links and extending trans- 6 versely of the wheel; an anti-friction member mounted upon the pivot element; a shoe movable into and out of the circumference described by the anti-friction element as the wheel rotates; a spring secured to one link 6 and bearing on the other link; and means under the control of an operator for manipulating the shoe.

3. In a device of the class described, a wheel comprising a rim and ahub; a grip 7 slidable in the rim; a link pivoted to the grip; a link pivoted to the hub; a pivotelement uniting the links; a spring secured to one link and bearing upon the other link; the links and the pivot element forming an 7 expansible structure, a portion of which projects laterally; a shoe movable into and out of the circumference described by the laterally projecting portion .of the expansible structure; and means for-operating the 8 shoe.

' 4. In a device of the class described, a

wheel including a rim and -a hub; grips;

"versely of the wheel and into intersecting relation to the orbit described by the ends of the projections, one end of the shoe having a lateral lip disposed transversely of the plane defined by said orbit and adapted to 9 engage one pro ection, thereby pushing the same outwardly and permitting the next projection to ride on the outer face of the shoe.

In testimony that I claim the foregoing 1 as my own, I have hereto afixed my signature in the presence of two witnesses.

. FRANK'II. BABCUGK.

Witnesses:

ELIZABETH ItArr, J. W. BAUGHMAN. 

